rust/tests/ui/derives/rustc-decodable-issue-12315...

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Future incompatibility report: Future breakage diagnostic:
warning: use of unstable library feature 'rustc_encodable_decodable': derive macro for `rustc-serialize`; should not be used in new code
--> $DIR/rustc-decodable-issue-123156.rs:10:10
|
LL | #[derive(RustcDecodable)]
| ^^^^^^^^^^^^^^
|
= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
= note: for more information, see issue #64266 <https://github.com/rust-lang/rust/issues/64266>